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When is a destructor in C++ called?

1) When the garbage function is called.
2) When a local object with block scope goes out of scope.
3) When the delete function is called.
4) Cannot be determined.

Answer :

A C++ destructor is called when a local object with block scope goes out of scope or when the delete function is called. C++ relies on explicit resource management, not a garbage collection mechanism. Hence, both 2) and 3) are correct options.

A destructor in C++ is called in multiple scenarios, including when a local object with block scope goes out of scope and when the delete function is called. There is no garbage function in C++ as it does not have a garbage collector like some other languages. Here are the correct circumstances:

  • When a local object with block scope goes out of scope (Option 2).
  • When the delete function is called for a dynamically allocated object (Option 3).

Managing the lifecycle of resources is a critical aspect of C++ programming. The concept of scope ensures that objects are deallocated when they are no longer needed, which is fundamental for avoiding memory leaks and keeping resource usage optimal. It's important for programmers to be aware of when destructors are triggered to manage resources effectively. Hence, both 2) and 3) are correct options.

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